Subtract 28/21 from 4/75
1st number: 4/75, 2nd number: 1 7/21
4/75 - 28/21 is -32/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 75 × 7 = 525,
4/75 = 4 × 7/75 × 7 = 28/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
28/21 = 28 × 25/21 × 25 = 700/525 - Subtract the two like fractions:
28/525 - 700/525 = 28 - 700/525 = -672/525 - After reducing the fraction, the answer is -32/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/75-28/21 4/75-56/21 4/75-28/42 12/75-28/21 4/75-84/21 4/75-28/63 20/75-28/21 28/75-28/21